CODEWITHSUNDEEP
cassandragrafanastargate-ossk8ssandra
Thong Nguyen
Thong Nguyen

Reputation: 291

How to view Cassandra number of read/write per seconds

Previously, I deployed Cassandra with k8ssandra-operator 1.4 with kube-prometheus-stack enabled, inserting data directly to C* node via CQL. I can see k8ssandra:read/write rates when access Grafana dashboard on Web UI.

But after enabling stargate, and inserting to stargate service, I can't see those metrics. I assumed the way Stargate work is to write/flush temporary SSTables so k8ssandra:read/write metrics are not logged.

enter image description here

Is there any way to see those metrics, nodetool? prometheus?

Solutions

I added these config follow @Arron answer and it worked, have to restart stargate and related prometheus pods.

stargate:
  enabled: true
  replicas: 3
  heapMB: 1024
  cpuReqMillicores: 1000
  cpuLimMillicores: 1000
  telemetry:
    prometheus:
      enabled: true

enter image description here

Upvotes: 1

Views: 121

Answers (1)

Aaron
Aaron

Reputation: 57798

Talked to the K8ssandra team on this one. Try enabling Prometheus telemetry for Stargate:

https://docs.k8ssandra.io/reference/crd/releases/k8ssandra-operator-releases/k8ssandra-operator-crds-1.4/#stargatespectelemetryprometheus

Stargate.spec.telemetry.prometheus ↩ Parent

Name    Type    Description    
enabled boolean Enable the creation of Prometheus serviceMonitors for this resource (Cassandra or Stargate).

This should allow those metrics to come through.

Upvotes: 1

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